S&S Cycle IST Ignition System for 1984-1999 Big Twin and Custom Applications - Manual (Page 5)

Installing components without removing the fuel tank is a timesaving suggestion only. If there is any reservation on the part of the installing
mechanic about performing this installation with the fuel tank in place, refer to the appropriate service manual for correct procedure for
removing fuel tank and related components.
1. Cylinder Head Temperature Sensor Installation.
Harley-Davidson® Evolution® style engines use a special intake flange bolt with an integral temperature sensor. See Picture 5, below.
a. Remove the bolt from the front intake mounting flange.
b. Install the Cylinder Head Temperature Sensor and washer in the front head intake mounting flange.
c. Tighten to 6-10 ft.-lbs. (standard intake bolt torque).
2. Installation of the Knock Sensor Kit
Locate the knock sensor at the top motor mount at the rear cylinder head attachment point.
a. Remove rear motor mount bolt from rear cylinder head.
b. Test fit Knock Sensor Mounting block to rear motor mount location using 3⁄8" x 2" coarse thread bolt and 3⁄8" lockwasher. Test fit Knock
Sensor to mounting block using supplied mounting bolt and lockwasher. See Picture 6, below.
NOTE: Knock Sensor Kit includes an extra bolt and washer not used in Harley-Davidson® Evolution® installation.
Carefully place fuel tank back into position to check Knock Sensor and mounting block clearance. Position the mounting block so that
the Knock Sensor or mounting block does not contact the fuel petcock or any other part of the motorcycle. If the outer body of the Knock
Sensor (black plastic portion) contacts the engine or any other part of the motorcycle, it could damage the Knock Sensor, or interfere
with its ability to detect knock. Special care for rubber mounted motors must be given. View Knock Sensor while motor runs to make
sure it has proper clearence.
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Picture 5
Picture 6
CAUTION